I just tried enabling it for the first time and was met with no space left errors, is there anything I can do ? Or the only way is to make my image smaller ? Maximize disk space is enabled already

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Unfortunately build-chunked-oci takes up a lot of space. How big is the uncompressed size of your image? And are you using the latest version (v1.11.0) of the GitHub action? There's a disk space optimization in the latest version (assuming you're also using the latest version, v0.9.30, of the CLI)